2007 Bmw 6 Series on 2040-cars

Auto blog

Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

Recharge Wrap-up: BMW X5 PHEV debuting in Shanghai, Proterra sets up shop in CA

South Carolina-based Proterra has received funding to build electric buses in California. The California Energy Commission has awarded the company, which is headed by former Tesla executive Ryan Popple, a $3-million grant. Proterra will use the funds for a facility in the LA suburb the City of Industry, where its largest customer, Foothill Transit, also operates. Proterra has also opened an office in San Bruno, just south of San Francisco. Read more at SFGate or at ValueWalk. Despite its "urban mobility" design, the BMW i3 has become popular outside of large cities. Rather than singular urban centers, "The strongholds in this country are parts of California, Texas and southern Florida," said BMW North America CEO Ludwig Willisch. He also says the electric car hasn't been particularly successful in the Northeast, with cities like New York perhaps not being as mindful of sustainability as California. BMW is also nearing i3 sales of 12,000 a year, which Willisch calls "a sustainable rate." Read more at Automotive News. BMW will debut its X5 xDrive40e plug-in hybrid at the Shanghai Motor Show this month. It is the first PHEV from BMW's core brand (not from its i sub-brand). It uses a turbocharged four-cylinder engine and electric motor for a total of 313 horsepower, and a combined fuel economy of about 70 miles per gallon (according to the ECE test cycle). Press days for the Shanghai Motor Show are April 20-21. Read more in the press release below. BMW at Auto Shanghai 2015. At a glance •BMW at the 16th International Automobile & Manufacturing Technology Exhibition (Auto Shanghai) from 22 – 29 April 2015 (Press Days from 20 – 21 April). •BMW presents a world premiere, four Asian premieres and two Chinese premieres in Shanghai. •World premiere: the BMW X5 xDrive40e Sports Activity Vehicle is the first plug-in hybrid series-production model from the BMW core brand. •Asian premiere: the new BMW 2 Series Gran Tourer is the first premium model in its segment to offer maximum variability and room for up to seven people. •Asian premiere: the new edition of the BMW 1 Series is even more expressive, sporting and efficient than before. •Chinese premiere for the three athletes in the luxury class: the new BMW 6 Series Convertible, the new BMW 6 Series Coupe and the new BMW 6 Series Gran Coupe. •Chinese premiere with top-notch driving dynamics, efficiency and exclusivity: the new BMW M6 Coupe and the new BMW M6 Gran Coupe.

BMW shows up-armored X5 concept and we can't get near it

BMW has brought a slightly different concept vehicle to the 2013 Frankfurt Motor Show. Rather than something that foreshadows a future product or a new design direction, the Munich-based manufacturer has brought an X5 that's designed to be shot at. It's called the Concept X5 Security Plus. The Concept X5 name is a bit misleading, though. It's based on the 2014 X5, while BMW already builds an armored CUV, called the X5 Security. The concept tag has to do with the "Security Plus" part.
Engineered to be compliant with VR6 security standards - the current X5 Security is for VR4 standards - the Concept X5 will quite happily shrug off direct attacks from an AK-47. Thanks to sealed joints, high-strength steel moldings, high-performance steel body panels and special, polycarbonate-coated security glass, Kalashnikov's finest, whether used as a firearm or as a melee weapon, would be useless against this X5.
Built alongside the standard X5 in BMW's Spartanburg, SC factory, the X5 is shipped to a BMW facility in Toluca, Mexico for installation of the armor and security features. The company claims this delivers a more thoroughly engineered protective solution than aftermarket retrofitting.